| /* |
| * Copyright (c) 2019 Vestas Wind Systems A/S |
| * |
| * SPDX-License-Identifier: Apache-2.0 |
| */ |
| #ifndef ZEPHYR_INCLUDE_DT_BINDINGS_PWM_PWM_H_ |
| #define ZEPHYR_INCLUDE_DT_BINDINGS_PWM_PWM_H_ |
| |
| /** |
| * @name PWM period set helpers |
| * The period cell in the PWM specifier needs to be provided in nanoseconds. |
| * However, in some applications it is more convenient to use another scale. |
| * @{ |
| */ |
| |
| /** Specify PWM period in nanoseconds */ |
| #define PWM_NSEC(x) (x) |
| /** Specify PWM period in microseconds */ |
| #define PWM_USEC(x) (PWM_NSEC(x) * 1000UL) |
| /** Specify PWM period in milliseconds */ |
| #define PWM_MSEC(x) (PWM_USEC(x) * 1000UL) |
| /** Specify PWM period in seconds */ |
| #define PWM_SEC(x) (PWM_MSEC(x) * 1000UL) |
| |
| /** @} */ |
| |
| /** |
| * @name PWM polarity flags |
| * The `PWM_POLARITY_*` flags are used with pwm_pin_set_cycles(), |
| * pwm_pin_set_usec(), pwm_pin_set_nsec() or pwm_pin_configure_capture() to |
| * specify the polarity of a PWM pin. |
| * The flags are on the lower 8bits of the pwm_flags_t |
| * @{ |
| */ |
| /** PWM pin normal polarity (active-high pulse). */ |
| #define PWM_POLARITY_NORMAL (0 << 0) |
| |
| /** PWM pin inverted polarity (active-low pulse). */ |
| #define PWM_POLARITY_INVERTED (1 << 0) |
| |
| /** @cond INTERNAL_HIDDEN */ |
| #define PWM_POLARITY_MASK 0x1 |
| /** @endcond */ |
| /** @} */ |
| |
| #endif /* ZEPHYR_INCLUDE_DT_BINDINGS_PWM_PWM_H_ */ |
